+IWL
Hi Intel team, anyone have an idea on this? Looks like maybe removal of
device 0 that had originally registered PTP clock isn't handled well?
On 7/24/25 1:25 PM, Frederick Lawler wrote:
Hi,
On Linux 6.12.39, we appear to hit a race reading ethtool while the
device is removed.
We have automation to remove unused interfaces during early boot
process, and when systemd is restarting the network afterwards, we
get a page fault and get into a boot-crash-loop state. We're currently
renaming the interface to something like unused0 to circumvent the
issue.
I was able to reproduce with the following snippet:
$ watch -n0.1 /sbin/ethtool -T ext0
$ echo -n "1" | sudo tee /sys/class/net/ext0/device/remove
ice 0000:41:00.0: Removed PTP clock
...
Oops: general protection fault, probably for non-canonical address
0xae09e2b3b0c665f1: 0000 [#1] PREEMPT SMP NOPTI
Tainted: [O]=OOT_MODULE
Hardware name: Lenovo HR355M-V3-G12/HR355M_V3_HPM, BIOS HR355M_V3.G.031
02/17/2025
RIP: 0010:ptp_clock_index (drivers/ptp/ptp_clock.c:476 (discriminator 1))
Code: 38 1b 4e 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 <8b> 87 94 03 00 00 e9 07 1b 4e
00 66 66 2e 0f 1f 84 00 00 00 00 00
All code
========
0: 38 1b cmp %bl,(%rbx)
2: 4e 00 66 66 rex.WRX add %r12b,0x66(%rsi)
6: 2e 0f 1f 84 00 00 00 cs nopl 0x0(%rax,%rax,1)
d: 00 00
f: 66 90 xchg %ax,%ax
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: f3 0f 1e fa endbr64
25: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
2a:* 8b 87 94 03 00 00 mov 0x394(%rdi),%eax <-- trapping
instruction
30: e9 07 1b 4e 00 jmp 0x4e1b3c
35: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
3c: 00 00 00 00
Code starting with the faulting instruction
===========================================
0: 8b 87 94 03 00 00 mov 0x394(%rdi),%eax
6: e9 07 1b 4e 00 jmp 0x4e1b12
b: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
12: 00 00 00 00
RSP: 0018:ffffb5664f657c88 EFLAGS: 00010282
RAX: ffff9f4854c201a0 RBX: ffffb5664f657d34 RCX: ffffffffc1c6a5c0
RDX: 555485607aaada55 RSI: ffffb5664f657d34 RDI: ae09e2b3b0c6625d
RBP: ffffb5664f657df0 R08: 0000000000000000 R09: ffff9f3124c570a8
R10: ffffb5664f657cc0 R11: 0000000000000001 R12: ffffffffafab4680
R13: 00007ffc828fdbb0 R14: ffff9f3124c57000 R15: ffffb5664f657d80
FS: 00007ff5abba1340(0000) GS:ffff9f402f600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5ac03f0c0 CR3: 0000000a8768e006 CR4: 0000000000770ef0
PKRU: 55555554
Call Trace:
<TASK>
ice_get_ts_info (drivers/net/ethernet/intel/ice/ice_ethtool.c:3776
(discriminator 1)) ice
__ethtool_get_ts_info (net/ethtool/common.c:713)
__ethtool_get_ts_info (net/ethtool/common.c:713)
dev_ethtool (net/ethtool/ioctl.c:2651 net/ethtool/ioctl.c:3312
net/ethtool/ioctl.c:3390)
? srso_alias_return_thunk (arch/x86/lib/retpoline.S:182)
? trace_call_bpf (kernel/trace/bpf_trace.c:151 (discriminator 38))
? security_file_ioctl (security/security.c:2909)
? trace_call_bpf (kernel/trace/bpf_trace.c:151 (discriminator 38))
? __x64_sys_ioctl (fs/ioctl.c:893)
? kprobe_ftrace_handler (arch/x86/kernel/kprobes/ftrace.c:45 (discriminator 1))
? srso_alias_return_thunk (arch/x86/lib/retpoline.S:182)
dev_ioctl (net/core/dev_ioctl.c:720)
sock_ioctl (net/socket.c:1242 net/socket.c:1346)
__x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:907 fs/ioctl.c:893 fs/ioctl.c:893)
osnoise_arch_unregister (??:?)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
RIP: 0033:0x7ff5abe13d1b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48
8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48
8b 44 24 18 64 48 2b 04 25 28 00 00
All code
========
0: 00 48 89 add %cl,-0x77(%rax)
3: 44 24 18 rex.R and $0x18,%al
6: 31 c0 xor %eax,%eax
8: 48 8d 44 24 60 lea 0x60(%rsp),%rax
d: c7 04 24 10 00 00 00 movl $0x10,(%rsp)
14: 48 89 44 24 08 mov %rax,0x8(%rsp)
19: 48 8d 44 24 20 lea 0x20(%rsp),%rax
1e: 48 89 44 24 10 mov %rax,0x10(%rsp)
23: b8 10 00 00 00 mov $0x10,%eax
28: 0f 05 syscall
2a:* 89 c2 mov %eax,%edx <-- trapping
instruction
2c: 3d 00 f0 ff ff cmp $0xfffff000,%eax
31: 77 1c ja 0x4f
33: 48 8b 44 24 18 mov 0x18(%rsp),%rax
38: 64 fs
39: 48 rex.W
3a: 2b .byte 0x2b
3b: 04 25 add $0x25,%al
3d: 28 00 sub %al,(%rax)
...
Code starting with the faulting instruction
===========================================
0: 89 c2 mov %eax,%edx
2: 3d 00 f0 ff ff cmp $0xfffff000,%eax
7: 77 1c ja 0x25
9: 48 8b 44 24 18 mov 0x18(%rsp),%rax
e: 64 fs
f: 48 rex.W
10: 2b .byte 0x2b
11: 04 25 add $0x25,%al
13: 28 00 sub %al,(%rax)
...
RSP: 002b:00007ffc828fdb20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000056370e675800 RCX: 00007ff5abe13d1b
RDX: 00007ffc828fdb80 RSI: 0000000000008946 RDI: 0000000000000005
RBP: 000056370e6757e0 R08: 00007ff5abee8c60 R09: 0000000000000000
R10: 00007ff5abd2f310 R11: 0000000000000246 R12: 00007ffc828fdd80
R13: 0000000000000005 R14: 00007ffc828fdb80 R15: 00007ffc828fff1a
</TASK>
